CTV, Video & Audio

VAST Wrapper

A VAST response that points to another VAST URL instead of the media file, letting multiple parties add tracking; long wrapper chains cause latency and errors.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

A VAST wrapper is a VAST response that points to another VAST URL instead of directly containing the video media file. Wrappers let multiple parties, such as ad servers and verification vendors, add their own tracking along the way. However, long chains of wrappers increase latency and error rates, causing failed or delayed ads.